Bumping an old topic here. This was linked on the WoW-US forums. Here's a response to the thread I gave. Let's keep the Mongoose/Executioner discussion in a single thread.
Keep in mind that Executioner for a tanking weapon is in an environment where you've already stacked five Sunder Armors and often a Curse of Recklessness. Also keep in mind that part of the Mongoose benefit is in the form of Haste, which has zero effect on your Shield Slam (or other abilities).
Procs and crits are relatively reliable in terms of occurrence. What is a lot less likely to give you a benefit is a crit derived from a proc -- in this case, a Critical Strike occurring as a result of the 4% Crit during a Mongoose proc. Yes, you'll see the benefit over time, but it's far less likely you'll see the (lesser) benefit provided by a chance-on-a-chance occurrence when it actually matters in the early stages of a fight.
As it stands it's a choice. If you are focused on Damage Reduction as a general policy with your weapons you want to go with Mongoose. If you want Threat, you go with Executioner. They aren't close to each other in effectiveness, and arguing Mongoose is nearly as effective as Executioner for Threat is a dead argument.
For me, nothing in this game is going to kill me. That's true of most tanks who are in Black Temple gear. It's at a point where it really doesn't matter what I socket or what I do. So long as I don't drop the quality of my gear, there's nothing in this game that can kill me. So Threat makes more sense to me. And even that doesn't matter particularly much with the recent Expertise change. I'll change over once the enchant is available and doesn't cost me too much.
Different gear for different situations. ;-)
